220-1101 Virtualization and Cloud Computing Practice Test 6 — 15 Questions

Question 1

A web application hosted on a public cloud platform automatically adds virtual server instances during high traffic and removes them during low traffic, without requiring manual intervention. This is an example of which cloud computing characteristic?

Accepted Answer

Rapid elasticity. The scenario describes a web application that automatically scales virtual server instances up and down based on traffic demand, which is the defining characteristic of rapid elasticity. This cloud computing feature allows resources to be provisioned and released elastically, often automatically, to match workload fluctuations. The key here is the automatic scaling without manual intervention, which distinguishes rapid elasticity from other characteristics like on-demand self-service, which focuses on user-initiated provisioning.

Answer

On-demand self-service

Answer

Broad network access

Answer

Measured service

Question 2

A small company hosts its customer-facing web application on a public cloud provider's infrastructure. However, due to regulatory requirements, the company must keep its customer database on a private server located at its own data center. The web application needs to access the database for real-time transactions. Which cloud deployment model best describes this setup?

Accepted Answer

A. Hybrid cloud. This setup combines a public cloud for the customer-facing web application with a private on-premises server for the customer database, which is the defining characteristic of a hybrid cloud deployment model. Hybrid cloud allows workloads to run in separate environments while maintaining connectivity, often via VPN or dedicated circuits, enabling real-time transactions between the public and private components.

Answer

B. Public cloud

Answer

C. Private cloud

Answer

D. Community cloud

Question 3

A company runs a cluster of hosts running a Type 1 hypervisor. The virtual machines (VMs) are configured to ensure that if a physical host fails, the VMs running on that host will be automatically restarted on another host in the cluster. Which feature provides this capability?

Accepted Answer

High Availability (HA). High Availability (HA) is the correct feature because it is designed to automatically restart virtual machines on alternate hosts within a cluster when a physical host fails. HA uses heartbeat monitoring between hosts and the management server to detect failures, then triggers the restart of affected VMs on surviving hosts, ensuring minimal downtime without requiring manual intervention.

Answer

vMotion

Answer

Fault Tolerance (FT)

Answer

Distributed Resource Scheduler (DRS)

Question 4

A company uses a cloud service that allows them to automatically increase the number of web server instances during peak traffic periods and decrease them during off-peak hours. They only pay for the instances they use. This scenario best exemplifies which characteristic of cloud computing?

Accepted Answer

Elasticity. Elasticity in cloud computing refers to the ability to automatically scale resources up or down based on demand. In this scenario, the company automatically increases web server instances during peak traffic and decreases them during off-peak hours, paying only for what they use, which is the defining behavior of elasticity.

Answer

High availability

Answer

Metered service

Answer

Disaster recovery

Question 5

A company uses a cloud service where administrators can provision virtual machines with pre-configured operating systems and applications from a catalog. They can scale the number of VMs up or down as needed, but they are responsible for managing the guest OS and applications. Which cloud service model does this describe?

Accepted Answer

Infrastructure as a Service (IaaS). This scenario describes Infrastructure as a Service (IaaS) because the cloud provider supplies virtualized hardware resources (VMs, storage, networking), while the customer retains full control over the guest operating system and applications. The administrator provisions pre-configured VMs from a catalog and scales them up or down, but is responsible for OS patching, application management, and security within the VM. This aligns with the IaaS shared responsibility model where the provider manages the hypervisor and physical infrastructure, and the customer manages everything above the OS layer.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 6

A system administrator manages a cluster of hosts running a Type 1 hypervisor. The administrator needs to move a virtual machine (VM) from one physical host to another in the cluster without turning off the VM or interrupting its services. The hypervisor supports this capability. Which of the following features should the administrator use?

Accepted Answer

Live migration. Live migration (also known as vMotion in VMware environments) allows a running virtual machine to be moved between physical hosts with zero downtime and no service interruption. The hypervisor transfers the VM's memory state and storage access over a dedicated network while the VM continues to operate, then briefly pauses execution to switch over the final state. This matches the requirement of moving a VM without turning it off or interrupting services.

Answer

High availability

Answer

Snapshot

Answer

Cloning

Question 7

A company requires full control over the operating system and applications running on cloud servers. They want to provision virtual machines with their own custom images and manage all software updates themselves. The cloud provider is responsible only for the underlying physical hardware and hypervisor. Which cloud service model should the company use?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, storage, and applications. The cloud provider manages only the underlying physical hardware and hypervisor, while the customer is responsible for deploying custom images, applying patches, and managing all software updates. This aligns exactly with the company's requirement for full OS and application control with provider responsibility limited to the physical layer.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 8

A company uses a cloud service that provides virtual machines. The company administrators have full control over the guest operating systems, install their own applications, and manage security patches and updates. The cloud provider is responsible for the underlying physical servers, storage, and networking. This scenario best describes which cloud service model?

Accepted Answer

Infrastructure as a Service (IaaS). This scenario describes Infrastructure as a Service (IaaS) because the company has full control over the guest operating systems, applications, and security patches, while the cloud provider manages the underlying physical infrastructure (servers, storage, networking). In IaaS, the provider delivers virtualized computing resources over the internet, and the customer retains administrative access to the OS and installed software, which matches the description exactly.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 9

A company hosts its e-commerce platform on a public cloud. The cloud provider monitors the health of virtual server instances and automatically redirects incoming requests away from any instance that fails to respond. This ensures that the platform remains operational even if individual VMs crash. Which cloud computing characteristic does this scenario BEST illustrate?

Accepted Answer

Fault tolerance. This scenario best illustrates fault tolerance because the cloud provider automatically detects a failed virtual server instance and redirects incoming requests away from it, ensuring the platform continues to operate without interruption. Fault tolerance is the ability of a system to continue functioning even when one or more of its components fail, which is exactly what the automatic redirection of traffic from a crashed VM achieves.

Answer

High availability

Answer

Elasticity

Answer

Resource pooling

Question 10

A company wants to deploy a custom web application in the cloud. They need full control over the operating system and software stack, including the ability to install and configure the web server, database, and security patches. They do not want to manage the underlying physical hardware or hypervisor. Which cloud service model best meets their requirements?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, middleware, and applications while the cloud provider manages the underlying physical hardware and hypervisor. This matches the requirement for full OS and software stack control without managing physical infrastructure.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 11

A company develops a web application that relies on a custom library available only for a specific Linux distribution. They want to deploy the application in the cloud with minimal administrative overhead, but they need full control over the software stack, including the ability to install the custom library and configure the web server. Which cloud service model BEST meets these requirements?

Accepted Answer

Infrastructure as a Service (IaaS). IaaS provides virtualized computing resources (e.g., virtual machines) over the internet, giving the company full control over the operating system, software stack, and configuration. This allows them to install the custom library specific to a Linux distribution and configure the web server as needed, while the cloud provider handles the underlying physical infrastructure, minimizing administrative overhead. SaaS, PaaS, and FaaS abstract away the underlying OS and runtime, preventing the installation of distribution-specific libraries or custom server configuration.

Answer

Software as a Service (SaaS)

Answer

Platform as a Service (PaaS)

Answer

Function as a Service (FaaS)

Question 12

A development team wants to deploy a custom web application. They want to focus solely on writing and updating the application code without managing the underlying operating system, runtime, web server, or middleware. The team also wants the cloud provider to automatically handle patching of the OS and platform components. Which cloud service model BEST meets these requirements?

Accepted Answer

Platform as a Service (PaaS). Platform as a Service (PaaS) provides a managed platform that includes the operating system, runtime, web server, and middleware, allowing developers to focus solely on writing and updating application code. The cloud provider automatically handles patching of the OS and underlying platform components, which directly matches the team's requirement to avoid managing infrastructure.

Answer

Infrastructure as a Service (IaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 13

An online retailer's website experiences periodic spikes in traffic during flash sales. The cloud platform automatically spins up additional virtual server instances to handle the increased load and then terminates them when the traffic subsides. This capability is an example of which characteristic of cloud computing?

Accepted Answer

Elasticity. Elasticity refers to the ability of a cloud system to automatically scale resources up or down based on demand. In this scenario, the platform spins up additional virtual server instances during flash sales and terminates them when traffic subsides, which is the defining behavior of elasticity. This contrasts with high availability, which focuses on uptime, not dynamic scaling.

Answer

High availability

Answer

Fault tolerance

Answer

Measured service

Question 14

A company wants to deploy a custom web application that includes a custom database and a web server with specific modules. The development team needs full control over the operating system, including the ability to apply security patches and install third-party software. The company does not want to manage the physical servers, hypervisors, or network infrastructure. The cloud provider will be responsible for the underlying hardware and virtualization layer. Which cloud service model BEST meets these requirements?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, including the ability to apply security patches and install third-party software. The cloud provider manages the physical servers, hypervisors, and network infrastructure, while the customer retains administrative access to the OS, which is essential for deploying a custom web application with a custom database and specific modules.

Answer

Software as a Service (SaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 15

A company is developing a custom application that requires a specific Linux kernel version and full root access to install and configure third-party security modules. The company wants to minimize the management of physical infrastructure but needs complete control over the operating system environment, including the ability to modify kernel parameters. The cloud provider will be responsible for all underlying hardware and the hypervisor. Which cloud service model should the company choose?

Accepted Answer

Infrastructure as a Service (IaaS). IaaS provides virtualized computing resources over the internet, granting the customer full administrative control over the operating system, including the ability to install custom kernels, modify kernel parameters, and install third-party security modules. The cloud provider manages the physical hardware and hypervisor, while the customer retains complete control of the guest OS, meeting the requirement for root access and kernel customization without managing physical infrastructure.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Database as a Service (DBaaS)